Vaccine makers praised the U.S. response to the swine flupandemic on Wednesday but said regulatory delays and public suspicion have held up innovative ways to speed and stretch the U.S. influenza vaccine supply.

Vaccine makers praised the U.S. response to the swine flupandemic on Wednesday but said regulatory delays and public suspicion have held up innovative ways to speed and stretch the U.S. influenza vaccine supply.

Pregnant women and other people at high risk should be vaccinated against the H1N1 swine fluvirus as the cold weather begins to bite in the northern hemisphere, the World Health Organization (WHO) said on Tuesday.